Partially UVW Animated alpha mask for circuit board shader
I found a solution. I wanted to have a mask that I can animate to determine the alpha channels overall opacity, overriding the alpha mask information. (can be used in literally any game vfx...) I have to figure out though how to add this as decal to other materials but that is another one.
Here is the solution: 
And here is the solution I used to blend it onto another material. If you can tell me how to make a more clean, proper version of this i would be very grateful. This feels a little bit wacky.